Let's suppose the diameter (AB) of the circle is 20 cm and AD is 18 cm. How would we calculate DC? Or for that matter, is it possible to calculate angle CBD or angle CAD?

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Segment an is an altitude of right δabc with a right angle at a. if ab = 2, squared 5 in and nc = 1 in, find bn, an, ac.